From: Dan Cross <cross@math.psu.edu>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] OS install floppy hangs during boot on Bochs 1.4.1
Date: Wed, 27 Nov 2002 13:18:00 -0500 [thread overview]
Message-ID: <200211271818.gARII0w00432@augusta.math.psu.edu> (raw)
In-Reply-To: Your message of "Mon, 25 Nov 2002 22:56:54 MST." <20021125225654.B2266@tibia.amotlpaa.bogus>
> For my next trick... I wonder whether the MD5 algorithm is such
> that the hash for the concatenation of two blocks of bits can be
> determined quickly from the hashes for the two blocks.
Good God, I hope not. MD5 shouldn't be a homomorphism.
> Then, you
> see, you could have the hash(es) for the invariant part(s) of the
> disk image lying around, and combine it (them) on the fly with the
> hash for the user's individual plan9.ini.
You could hash the hashes of the two bits, which would be
computationally cheap (relatively speaking).
- Dan C.
next prev parent reply other threads:[~2002-11-27 18:18 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-11-26 3:00 Russ Cox
2002-11-26 2:59 ` andrey mirtchovski
2002-11-26 5:56 ` Steven Taschuk
2002-11-26 10:25 ` Boyd Roberts
2002-11-27 18:18 ` Dan Cross [this message]
-- strict thread matches above, loose matches on Subject: below --
2002-11-26 3:27 Geoff Collyer
2002-11-26 3:10 Russ Cox
2002-11-26 5:47 ` Steven Taschuk
2002-11-25 21:18 Russ Cox
2002-11-26 1:08 ` Steven Taschuk
2002-11-25 20:47 Steven Taschuk
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=200211271818.gARII0w00432@augusta.math.psu.edu \
--to=cross@math.psu.edu \
--cc=9fans@cse.psu.edu \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).